空气暴露对锌水电池中二氧化锰阴极性能的影响

IF 18.2 1区材料科学 Q1 CHEMISTRY, PHYSICAL

ACS Energy Letters Pub Date : 2024-08-09 DOI:10.1021/acsenergylett.4c01612

Min Soo Jung, David Hoang, Yiming Sui, Xiulei Ji

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引用次数: 0

摘要

我们报告说，当测试电池暴露在空气中时，电解二氧化锰阴极可以显示出接近理论双电子转移容量的初始容量，远大于在氩气环境下组装电池时的容量。我们将这种差异归因于以下机制：MnO2 催化 O2 还原形成氧氧化还原介质，介导 MnO2 完全转化为 Mn2+ 离子。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Impact of Air Exposure on the Performance of the MnO2 Cathode in Aqueous Zn Batteries

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Impact of Air Exposure on the Performance of the MnO2 Cathode in Aqueous Zn Batteries

We report that the electrolytic manganese dioxide cathode can exhibit an initial capacity near the theoretical capacity for two-electron transfer when the testing cells are exposed to air, much greater than the capacity when the cells are assembled under argon. We attribute the disparity to the following mechanism: MnO₂ catalyzes O₂ reduction to form an oxygen redox mediator that mediates the complete conversion of MnO₂ to Mn²⁺ ions.

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来源期刊

ACS Energy Letters Energy-Renewable Energy, Sustainability and the Environment

CiteScore

31.20

自引率

5.00%

发文量

469

审稿时长

1 months

期刊介绍： ACS Energy Letters is a monthly journal that publishes papers reporting new scientific advances in energy research. The journal focuses on topics that are of interest to scientists working in the fundamental and applied sciences. Rapid publication is a central criterion for acceptance, and the journal is known for its quick publication times, with an average of 4-6 weeks from submission to web publication in As Soon As Publishable format. ACS Energy Letters is ranked as the number one journal in the Web of Science Electrochemistry category. It also ranks within the top 10 journals for Physical Chemistry, Energy & Fuels, and Nanoscience & Nanotechnology. The journal offers several types of articles, including Letters, Energy Express, Perspectives, Reviews, Editorials, Viewpoints and Energy Focus. Additionally, authors have the option to submit videos that summarize or support the information presented in a Perspective or Review article, which can be highlighted on the journal's website. ACS Energy Letters is abstracted and indexed in Chemical Abstracts Service/SciFinder, EBSCO-summon, PubMed, Web of Science, Scopus and Portico.